innerdude
Legend
Spycraft
I mean, basically the scenario is the same as a lot of the d20-boom RPGs, but Spycraft, which we played a bit, just always struck me and I think eventually the whole group as particularly bizarre in how it all fit together, and worked/didn't work.
Oh god even better and in the same vein:
d20 Modern
. . . that's a bizarre one.
Oh my gosh, d20 Modern is the perfect example.
The two sessions of d20 Modern I ever played were some of the most strange, random, off-putting spurts of gameplay I've ever seen. As you described, it's just this total mishmash of ideas that barely hold together, if at all.
And the funny thing is with Spycraft, is Crafty Games went the exact opposite route with Fantasy Craft and completely retooled the d20 system from the ground up to create what I consider to be the ultimate expression of the D&D 3-era rules. Fantasy Craft is the exact opposite of Spycraft---it's thoroughly elegant, well thought through, highly integrated in its approach to both player and GM mechanics.